Blast-gate



F. McNiURDl-E.

BLAST GATE. APPLICATIQN FILED APR. a, lazo.

Patented my 1221921,

. Wmme/o FRANCIS MCM'URDIE, OF

KALAMAZOO, MICHIGAN.

BLAST-GATE.

meteor.

Application filed April 6,

To a-ZZ whom t may concern: Y

Be it known that I, FRANCIS MCMURDIE, a citizen of the United States,residing at the city and county of Kalamazoo Iand State of Michigan,have invented certain new and useful Improvements in Blast-Gates, ofwhich the following is a specification.

This invention relates to improvements in blast gates.

rIhe objects of the invention yare to provide a simple and effectiveconstruction of blast gate which shall be securely packed againstleakage and in which the slide will be frictionally held in any positiondesired.

Objects relating to details 'and economies of construction willdefinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification. The invention is clearlydefined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is fullyillustrated in the accompanying drawing, forming a part of thisspecification, in which:

Figure I is detail sectional elevation taken on line 1-1 of Fig. II, ofmy improved blast gate in position.

Fig. II is a detail sectional view, somewhatienlarged, taken on line 2#2of Fig. I, showing details of the support and the packing and supportand adjusting means for the slide.

In the drawing the sectional views arc taken looking in the direction ofthe little arrows at the ends of the section lines and similar numeralsof reference refer to similar parts throughout the several views.

Considering the numbered parts of the drawing, 1 is a sheet metal pipein which my improved blast gate is interposed. The blast gate support ismade up of two oppositelydisposed parts or plates 2, 2 provided withflanges 3 to which the pipe lis secured by suitable screws I lasillustrated. The two halves are secured together by a series of bolts 5around the margin of the frame. Bosses 6, project beyond the faces ofthe plates so that the bolts clamp the same securely together, leaving aspace 7 for the passage of the slide 7. Thisrpassage and support extendsdown into projections 2', 2 below or at one side of the pipe, as thecase Speccatonof Letters Patent.

Patented July i2, 1921i.

1920. serial No. 371,659.

may be, forming an entrance throat for the reception of the gate. rlheslide isprovided with a handle 8 for manipulation.

Ori-opposite sides of the gate within the entrance throat Iare supportedpackings 9 in suitable recesses 9, the same being fastened snuglyagainst dialnetrically opposite sides of the slide by bars 10, which areacted upon by set screws Il, so that any desired degree of pressure canbe put upon the packing material and it can be forced air tight againstthe opposite sides of the slide and being on diametrically oppositesides of the slide, it has little or no tendency to distort and warp thesame. rIhe set screws ll for 'accomplishing this adjusting are providedwith lock nuts l2 so that they may be secured leffectively in position.

I have described my improvements in the preferred form, but they may beconsiderably modified in detail without departing from my invention,which is defined and pointed out in the appended claims.`

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

l. In a blast gate structure, the combination of symmetricallyopposedhalves, suitably spaced from each other to form a guide and support forthe slide and fitted tight at their peripheries and extended to form anentrance throat, packing material in suitable recesses on diametricallyopposite sides of the slide within the entrance throat, bars for urgingthe said packing material against the diametrically opposite sides ofsaid slide, and suitable screws for applying pressure thereto, coactingas described for the purpose specified.

2. In a blast gate structure, a frame with guide for the slide withentrance throat therefor, packing means for said slide comprisingdiametrically opposed recesses within said throat, packing material inthe recesses, and bars back of the material with means of compressingthe same, as specified.

In witness whereof, I have hereunto set my hand and seal in the presenceof two witnesses.

FRANCIS MCMURDIE. [ne] Witnesses:

M. V. MILLER, GLEN C. SMITH.

